Capital Gains vs. Dividends vs. Interest: Which Income Is Best for Retirees?
Understanding how different types of investment income are taxed — and how to structure your portfolio for maximum after-tax efficiency
Not all investment income is created equal in the eyes of the CRA. A dollar of interest income, a dollar of eligible Canadian dividends, and a dollar of capital gains are taxed very differently. For retirees drawing from a significant portfolio, those differences add up to thousands of dollars every year.
Understanding the tax treatment of each income type and structuring your portfolio accordingly is one of the most practical and underutilized tools in retirement tax planning.
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The Three Main Types of Investment Income
1. Interest Income
Interest income is the least tax-efficient form of investment income. It is included in your taxable income in full, at your marginal rate. Exactly like employment or RRIF income. For an Ontarian with a combined marginal rate of 43.41% (the rate at income between approximately $111,733 and $150,000), a $10,000 GIC return generates a tax bill of $4,341. A high-income earner at Ontario's top combined rate of 53.53% keeps less than half of every dollar of interest earned.
Common sources: GICs, savings accounts, bonds, most fixed-income funds.
2. Canadian Eligible Dividends
Eligible dividends from Canadian corporations, typically public companies and some private corporations, are taxed much more favourably thanks to the dividend tax credit. The gross-up and credit mechanism is designed to integrate corporate and personal tax, recognizing that the company has already paid corporate tax on the profits before distributing them.
For an Ontarian with income in the middle brackets, the effective tax rate on eligible Canadian dividends can be remarkably low. Near zero for those with income below approximately $55,000, and considerably lower than interest income at higher income levels. For someone at the $111,733–$150,000 bracket, the combined marginal rate on eligible dividends is approximately 25.38%, compared to 43.41% on interest.
However, if you are receiving OAS there is one major caveat. OAS uses your net income as the income test to determine OAS clawback. Net income uses the grossed up dividend BEFORE the dividend tax credit is applied. This artificially inflates your net income from eligible dividends by 38%. This does not need to be a deal killer but careful planning is required. Especially if you are close to the OAS threshold. More on this later.
Common sources: Canadian bank stocks, utility companies, Canadian REITs, dividend-focused Canadian ETFs.
3. Capital Gains
Capital gains, the profit realized when you sell an asset for more than you paid. Capital gains receive preferential tax treatment because only a portion of the gain is included in taxable income currently 50%. Note, consult your advisor for the current inclusion rate, as this has been subject to proposed legislative changes in recent years.
Capital gains are also highly controllable, unlike interest or dividends, you generally decide when to realize them, allowing you to time gains in lower-income years.
Common sources: Equities, ETFs, real estate, private investments.
Quick Comparison at ~$130,000 Income (43.41% Tax Rate Combined Federal + Ontario, 2025 approximate)
$10,000 of interest income: ~$4,341 in tax. $10,000 of eligible dividends: ~$2,538 in tax. $10,000 of capital gains (50% inclusion): ~$2,171 in tax. The difference between interest and capital gains is roughly $2,170 on every $10,000 of income. A significant and permanent advantage for equity-heavy investors.
How This Affects Your Portfolio Structure
Understanding these differences should shape how you build and hold your investment portfolio, particularly across different account types.
Tax-sheltered accounts (RRSP/RRIF): Use for the least efficient income
Because all withdrawals from a RRSP or RRIF are taxed as ordinary income regardless of what earned them, the tax character of investments inside these accounts is irrelevant at withdrawal. As a result, it makes sense to hold your least tax-efficient assets inside registered accounts. Typically interest-bearing fixed income such as bonds, GICs, and mortgage investment corporations. So that the interest income is shielded from immediate taxation.
Non-registered (taxable) accounts: Favour equities and capital gains
In your non-registered accounts, the tax character of your investments matters enormously. Holding Canadian equities that generate eligible dividends, or equities that produce capital gains, minimizes the annual tax drag on your portfolio. Avoid holding high-interest savings or bond funds in non-registered accounts where possible.
TFSA: Hold your highest-growth assets
Since TFSA withdrawals are completely tax-free, it makes sense to hold your highest-growth assets inside the TFSA. So that the largest potential gains are sheltered entirely. Holding a GIC in a TFSA when you could hold it in an RRIF (and hold equities in the TFSA instead) is a missed opportunity
The TFSA is by far our favorite account. As your investments grow and compound you gain a permanent pool of capital that is entirely tax free. Over the course of your life, this tax free benefit is enormous. In addition, the TFSA is incredibly flexible. You can withdraw and recontribute the same amount in the following year. Providing fantastic tax benefits and flexibility.
The Impact on OAS Clawback
The type of income you earn also affects whether you trigger the OAS Recovery Tax (clawback), which begins when net income exceeds approximately $93,454 (2025).
Interest income and RRIF withdrawals count in full toward this threshold. Eligible dividends are grossed up before being included in net income. Meaning a $10,000 dividend is reported as $13,800 of income before the credit is applied, potentially pushing you over the clawback threshold even if your actual cash income is lower. Capital gains are only 50% included.
This makes dividend income a somewhat mixed blessing for those near the OAS threshold. The tax rate may be low, but the income inclusion can still trigger clawback. A full retirement income analysis accounts for all of these interactions.
Foreign Income: A Special Consideration
Foreign dividends (from U.S. or international stocks) do not qualify for the Canadian dividend tax credit. They are taxed as ordinary income, the same to interest. Plus there is often a non-resident withholding tax on the foreign side (commonly 15% from the U.S. under the tax treaty, which may be claimable as a foreign tax credit). For RRSP/RRIF accounts (not TFSA accounts) Canada has a treaty agreement with the US. Where US dividends are entirely exempt from withholding taxes.
This makes it particularly valuable to hold U.S. equities inside a RRSP or RRIF if possible. Both to shelter the dividend income from Canadian tax and to preserve the treaty exemption from U.S. withholding tax that applies in registered accounts.
Is Your Portfolio Structured for Maximum After-Tax Efficiency?
Tax-efficient portfolio structuring, knowing which assets to hold in which accounts, is one of the most practical ways to improve your retirement income without taking on additional risk. It is a core part of what we do for our clients.
Contact us today for a complimentary retirement income consultation.
Disclaimer
This publication is for informational purposes only and has been prepared from public sources which are meant to be reliable. None of the information in this should be construed as investment advice. Speak to your Investment Advisor to learn if this product is right for you. Designed Securities Ltd. (DSL) is regulated by the Canadian Investment Regulatory Organization (CIRO), and a Member of the Canadian Investor Protection Fund (www.cipf.ca). Christopher Burke is registered to advise in securities to clients residing in Ontario. The views expressed are those of the author and not necessarily those of DSL. This report does not constitute an offer or solicitation in any jurisdiction in which such offer or solicitation is not authorized or to any reliable person to whom it is unlawful to make such offer or solicitation. Content is accurate as of the date of publication, and subject to change without notice.
